This name is a synonym of Atriplex coronata var. vallicola (Hoover) S.L.Welsh.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Leafl. W. Bot. 2: 130 1938.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:26498-2.
This name was in version 1 of The Plant List, record kew-2665893, and has not been changed.